From patchwork Fri Jun 30 07:36:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13297699 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7BB0BC0015E for ; Fri, 30 Jun 2023 07:51:12 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qF8tJ-0001tw-UB; Fri, 30 Jun 2023 03:50:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qF8tI-0001ti-5q for qemu-devel@nongnu.org; Fri, 30 Jun 2023 03:50:04 -0400 Received: from mga03.intel.com ([134.134.136.65]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qF8tG-0002bq-8H for qemu-devel@nongnu.org; Fri, 30 Jun 2023 03:50:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688111402; x=1719647402; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=dX0W6Lwgs02fXVLOQjBdVVT7wZQlUQbNlFD/jzw8V5s=; b=GX0MWGJiNvB9QOMVECK9xMgMJY6I25ipcq5N7LAg3MBVUuIxlfsYC+64 Ytyf5dy6jzRmY35/GgAQC6ud6bXPX0rXaDaWlb4rqGjdHlrYFqH9xQq4/ swOuBigDX0BE8tnPoFw4CnydJe/9PjdIDedMihTd1wqaSuA6a+PW5N+U7 huvW6rvVMMD+/i/a2yyZ20jQObfFFVzjij37/zyUP9WVeNqdIyq0x45fR 3OAHcDv6HM8H3brawcdfdOttdq+IccZERe7aoSrIXcDymSMEKcn0amuqC EnPtfCwaz1Job8SQqnHhZLDZNMMH3hFgzno+OKcgXKNc3WKq1e49XGheh g==; X-IronPort-AV: E=McAfee;i="6600,9927,10756"; a="365824475" X-IronPort-AV: E=Sophos;i="6.01,170,1684825200"; d="scan'208";a="365824475" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2023 00:50:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10756"; a="841770807" X-IronPort-AV: E=Sophos;i="6.01,170,1684825200"; d="scan'208";a="841770807" Received: from duan-server-s2600bt.bj.intel.com ([10.240.192.147]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2023 00:49:58 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, joao.m.martins@oracle.com, avihaih@nvidia.com, chao.p.peng@intel.com Subject: [PATCH v5 5/7] vfio/migration: Change vIOMMU blocker from global to per device Date: Fri, 30 Jun 2023 15:36:35 +0800 Message-Id: <20230630073637.124234-4-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230630073637.124234-1-zhenzhong.duan@intel.com> References: <20230630073637.124234-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.65; envelope-from=zhenzhong.duan@intel.com; helo=mga03.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org vIOMMU migration blocker can be consolidated to per device default blocker, then some vIOMMU global blocker related functions and data could be removed. This change also makes vfio_mig_active() more accurate as it doesn't check for global blocker. Signed-off-by: Zhenzhong Duan Reviewed-by: Joao Martins --- hw/vfio/common.c | 51 ++--------------------------------- hw/vfio/migration.c | 7 ++--- hw/vfio/pci.c | 1 - include/hw/vfio/vfio-common.h | 3 +-- 4 files changed, 7 insertions(+), 55 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 00fef5aa08be..a8439447b990 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -362,7 +362,6 @@ bool vfio_mig_active(void) } static Error *multiple_devices_migration_blocker; -static Error *giommu_migration_blocker; static unsigned int vfio_migratable_device_num(void) { @@ -420,55 +419,9 @@ void vfio_unblock_multiple_devices_migration(void) multiple_devices_migration_blocker = NULL; } -static bool vfio_viommu_preset(void) +bool vfio_viommu_preset(VFIODevice *vbasedev) { - VFIOAddressSpace *space; - - QLIST_FOREACH(space, &vfio_address_spaces, list) { - if (space->as != &address_space_memory) { - return true; - } - } - - return false; -} - -bool vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp) -{ - int ret; - - if (giommu_migration_blocker || - !vfio_viommu_preset()) { - return true; - } - - if (vbasedev->enable_migration == ON_OFF_AUTO_ON) { - error_setg(errp, - "Migration is currently not supported with vIOMMU enabled"); - return false; - } - - error_setg(&giommu_migration_blocker, - "Migration is currently not supported with vIOMMU enabled"); - ret = migrate_add_blocker(giommu_migration_blocker, errp); - if (ret < 0) { - error_free(giommu_migration_blocker); - giommu_migration_blocker = NULL; - } - - return !ret; -} - -void vfio_migration_finalize(void) -{ - if (!giommu_migration_blocker || - vfio_viommu_preset()) { - return; - } - - migrate_del_blocker(giommu_migration_blocker); - error_free(giommu_migration_blocker); - giommu_migration_blocker = NULL; + return vbasedev->group->container->space->as != &address_space_memory; } static void vfio_set_migration_error(int err) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 09fa4714a085..80509958f0d3 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -883,9 +883,10 @@ bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp) return ret; } - ret = vfio_block_giommu_migration(vbasedev, errp); - if (!ret) { - return ret; + if (vfio_viommu_preset(vbasedev)) { + error_setg(&err, "%s: Migration is currently not supported " + "with vIOMMU enabled", vbasedev->name); + return vfio_block_migration(vbasedev, err, errp); } trace_vfio_migration_realize(vbasedev->name); diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 31c4ab250fbe..c2cf7454ece6 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3255,7 +3255,6 @@ static void vfio_instance_finalize(Object *obj) */ vfio_put_device(vdev); vfio_put_group(group); - vfio_migration_finalize(); } static void vfio_exitfn(PCIDevice *pdev) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index b3014ece2edf..3c18572322fc 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -227,7 +227,7 @@ extern VFIOGroupList vfio_group_list; bool vfio_mig_active(void); bool vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp); void vfio_unblock_multiple_devices_migration(void); -bool vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp); +bool vfio_viommu_preset(VFIODevice *vbasedev); int64_t vfio_mig_bytes_transferred(void); void vfio_reset_bytes_transferred(void); @@ -254,6 +254,5 @@ int vfio_spapr_remove_window(VFIOContainer *container, bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp); void vfio_migration_exit(VFIODevice *vbasedev); -void vfio_migration_finalize(void); #endif /* HW_VFIO_VFIO_COMMON_H */